Home › Community
Free to read · no account needed
Community questions & answers
Real questions from learners preparing for interviews, placements and exams, answered by other members. Everything here is public; sign in only when you want to ask or answer.
- 70questions
- 14topics
- 48answered on this page
- 4answers 3votes how many applications before your first offer? Real numbers pls, not linkedin numbers. Me: 23 off campus applications, 4 OAs, 2 interviews, 0 offers. On campus drives start in Oct for us. Interview PrepShruti Desai·20 days ago
- 2answers 4votes 6 losses in a row, I need to stop for today lost one close DBMS battle and then kept doing "one more to win it back". 6 losses later here I am. new rule: 2 losses in a row = done for the day GeneralAbhishek Dubey·20 days ago
- 3answers 9votes Tried the AI voice interview, honest review Did a 15 min Java backend one. Good: it actually asks follow ups. I said HashMap get is O(1) and it immediately asked what happens on collisions. The report at… Interview PrepDeepak Nair·21 days ago
- 3answers 7votes Finally in the top 10 on the leaderboard Started playing seriously 6 months ago, barely knew Python then. First time in the top 10 today. Nothing special, just played every day and read the explanatio… GeneralSuresh Kumar·21 days ago
- 2answers 4votes recursion samajh nahi aata yaar base case aur recursive call theek hai but tree recursion me (like subsets) dimag kharab ho jata hai. kaise practice karu DSARahul Yadav·21 days ago
- 4answers 14votes Cognizant GenC Next - selected Got the mail yesterday. Assessment: aptitude + 2 coding questions (one easy string, one medium array). Technical (~35 min): OOP pillars with examples, one SQL … Interview PrepGaurav Sethi·22 days ago
- 0answers 1votes HashSet vs TreeSet when to use which for interviews, is it just sorted vs not sorted? JavaTushar Goyal·21 days ago
- 1answer 2votes freeze power up kab use karna chahiye I always use it on the first question and then regret it later. when do you guys use it GeneralSakshi Jain·22 days ago
- 2answers 3votes rated battles vs solo practice? trying to climb the leaderboard. solo vs bots is better practice because I pick the topic but is it the same points? or only multiplayer counts GeneralKunal Bansal·23 days ago
- 2answers 6votes off campus drives kaha se pata chalte hai? college me bahut kam companies aati hai. off campus openings ke liye kya follow karte ho aap log? Interview PrepAnkit Rawat·23 days ago
- 4answers 11votes 30 day streak 🔥 first time I've done anything for 30 days straight lol. what helped: doing the daily before opening instagram in the morning. and keeping a list of every quest… GeneralRiya Banerjee·24 days ago
- 3answers 8votes process vs thread - how to answer in interview my answer sounds like I'm reading from a textbook (because I am). how do you explain it so it sounds like you actually understand Operating SystemsRahul Yadav·25 days ago
- 2answers 3votes today's daily Q7 answer is wrong? the one about the output of print(bool("False")). I said False, it says True. is the answer key wrong? GeneralNeha Joshi·24 days ago
- 3answers 6votes Blitz is too fast 😠I know the answers but by the time I read the options it has already answered. lost 4 in a row today on OS. any tips? GeneralSimran Kaur·26 days ago
- 2answers 7votes @Repository vs @Service vs @Component I answered "no difference, all are @Component" and it was marked wrong. what's the difference then? JavaBhavana Shetty·25 days ago
- 2answers 10votes how to know when to use binary search on answer Koko eating bananas, ship packages in D days etc. I understand the solution after seeing it but I never recognise these in a new problem DSAAditya Verma·27 days ago
- 0answers 1votes study partner for SQL? evenings beginner-intermediate, want someone to practise with in the evenings (IST) SQLSimran Kaur·26 days ago
- 3answers 9votes RANK vs DENSE_RANK vs ROW_NUMBER always mix up the first two. small example anyone? SQLSakshi Jain·28 days ago
- 3answers 5votes Striver sheet or Leetcode 75? 4 months left. which one should I do DSARitika Malhotra·28 days ago
- 2answers 6votes useEffect running twice? useEffect with [] calls my API twice. only in dev, production build is fine. what am I doing wrong ReactTushar Goyal·28 days ago
- 2answers 8votes URL shortener in a fresher interview - what do they expect got this in a mock. I jumped straight to "use a hash" and the interviewer wanted more structure. what does a decent fresher level answer look like System DesignSid Rao·29 days ago
- 2answers 3votes printf("%d", sizeof('a')) output? quiz said 4 but char is 1 byte? C++aman khan·29 days ago
- 4answers 15votes Amazon SDE intern OA HackerRank, 2 questions, 70 min + work style survey after. Q1: longest substring with at most k distinct characters (sliding window) Q2: grid, servers updating… Interview PrepVarun Reddy·1 month ago
- 3answers 11votes setTimeout 0 runs after promise.then? console.log('A'); setTimeout(() => console.log('B'), 0); Promise.resolve().then(() => console.log('C')); console.log('D'); I said A D B C, answer is A D C B. w… JavaScriptSneha Reddy·1 month ago
- 5answers 7votes Java or C++ for DSA? tier 3, 3rd year Know basic Java from college and basic C++ from school. Seniors are split. ~6 months to placements Interview PrepAnkit Rawat·1 month ago
- 2answers 6votes Belady's anomaly - why not in LRU FIFO can have more page faults with more frames, fine. why can't that happen with LRU? book just says "stack algorithm" and nothing else Operating SystemsKeerthana S·1 month ago
- 3answers 5votes Topics you want in the question pools? For me: TypeScript (generics, utility types), Linux commands, and basic cloud stuff. What about you all? GeneralPranav Bhat·1 month ago
- 2answers 9votes time and work using LCM, no fractions A does a job in 12 days, B in 18. total work = LCM(12,18) = 36 units A = 3 units/day, B = 2 units/day together 5/day -> 36/5 = 7.2 days works for pipes and cis… AptitudeIrfan Qureshi·1 month ago
- 2answers 6votes how do you trace recursion fast? int f(int n) { if (n <= 1) return 1; return f(n-1) + f(n-2); } f(4)? I keep messing up when drawing the full tree under time pressure DSANikhil Choudhary·1 month ago
- 4answers 5votes SQL battle group, Mon/Wed/Sat 9pm Looking for 4-5 people to do SQL battles regularly. You should know joins and group by, we can move to window functions later. Will post room codes here before… SQLManish Tiwari·1 month ago
- 3answers 22votes Microsoft internship (on campus) - got the offer OA: 2 questions in 60 min, one string and one DP on grid. Round 1: reverse linked list in groups of k. Then discussion on how I'd design an LRU cache (hashmap … Interview PrepGayathri Menon·1 month ago
- 2answers 4votes is var ever used in new code? or does it only exist for quiz questions JavaScriptTushar Goyal·1 month ago
- 2answers 9votes dark mode? doing the daily at 1am and the screen is a flashbang. any plans for dark mode? GeneralNikhil Choudhary·1 month ago
- 3answers 12votes Zoho interview - rejected after final round Writing this because most posts here are selections. Round 1: written test, C output questions + aptitude. Cleared. Round 2: programming on their system, 5 que… Interview PrepKeerthana S·1 month ago
- 3answers 10votes sem exams + placement prep at the same time, how? final year. sem exams in 3 weeks and placements going on in parallel. half the syllabus feels useless for interviews. how are you guys managing both GeneralLakshmi Venkatesh·1 month ago
- 2answers 7votes unordered_map got hacked on codeforces same solution with map passed. how is O(log n) beating O(1) C++Karthik Rajan·1 month ago
- 2answers 8votes why do video calls use UDP if it can lose packets TCP = reliable, UDP = fast, that's what I memorised. But then why would video calls use UDP, won't the call break if packets are lost? NetworkingBhavana Shetty·1 month ago
- 2answers 5votes OSI layers mnemonic bottom to top: Please Do Not Throw Sausage Pizza Away (physical, data link, network, transport, session, presentation, application) router = layer 3, switch = … NetworkingSwati Mishra·1 month ago
- 4answers 9votes HashMap bucket after Java 8 - linked list or tree? I said linked list and it was wrong. what changed in Java 8 JavaAkash Pandey·1 month ago
- 3answers 10votes Gladi's face when I lose 😠why does he look so disappointed. I already feel bad about losing to Rooky Raju, I don't need my own mascot judging me GeneralHarsh Vardhan·1 month ago
- 2answers 6votes git merge vs rebase - which one rewrites history Got this wrong in a quiz. Rebase rewrites history right? merge just adds a merge commit? GeneralDivya Krishnan·1 month ago
- 2answers 2votes Forouzan or Kurose for CN? for placements, not GATE NetworkingAisha Sheikh·1 month ago
- 2answers 5votes ACID examples other than bank transfer? every explanation uses bank transfer. want something different for interviews DBMSKunal Bansal·1 month ago
- 3answers 11votes Accenture assessment experience (ASE) Cognitive: english, critical reasoning, abstract reasoning. Abstract (pattern matrices) was the hardest for me, practise those. Technical: pseudocode output qu… Interview PrepYash Agarwal·1 month ago
- 2answers 9votes When does an index make queries slower? I know indexes slow down inserts/updates and aren't useful on very small tables. Quiz had an option about "low cardinality columns" and I wasn't sure. What els… DBMSPooja Patel·1 month ago
- 2answers 10votes a is b True for 256 but False for 257?? >>> a = 256 >>> b = 256 >>> a is b True >>> a = 257 >>> b = 257 >>> a is b False what PythonFatima Siddiqui·1 month ago
- 2answers 9votes tracked my daily challenge accuracy for 2 months Kept a spreadsheet (yes I'm that person). week 1-2: 55% week 3-4: 61% week 5-6: 68% week 7-8: 74% Mondays are always my worst day lol. Topics I also battle in … GeneralKunal Bansal·1 month ago
- 2answers 4votes is 6.8 cgpa enough for product companies? most on campus companies have 7 cutoff. off campus does anyone actually check cgpa? Interview PrepMohit Saini·1 month ago
- 1answer 5votes nested list comprehension order confuses me [x for row in matrix for x in row] which for runs first? I always get this wrong PythonDeepak Nair·1 month ago
- 4answers 18votes Stop bluffing in technical interviews Something I learned the hard way. In my first few interviews whenever I didn't know something I'd say something confidently and hope. Interviewers take intervi… Interview PrepFarhan Ali·1 month ago
Want the full explanation, not just an answer?
Structured lessons on DSA, core CS, Java and interview skills, each ending in a quiz so you know it stuck.