DESCO Assistant Engineer (CSE) Exam: 2016প্রশ্ন ও সমাধান
- Set by
- DESCO
- Post
- Assistant Engineer
- Exam date
- 2016
- Questions
- 8 (8 MCQ, 0 written)
- Exam guide
- Government IT officer posts · সরকারি প্রতিষ্ঠানের আইটি পদ
- Algorithms · অ্যালগরিদম 3
- Computer Architecture · কম্পিউটার আর্কিটেকচার 2
- General ICT · সাধারণ আইসিটি 1
- Networking · নেটওয়ার্কিং 1
- Web Technology · ওয়েব টেকনোলজি 1
Divide and Conquer method is used in-
- a)Merge sort
- b)Bubble sort
- c)Quick sort
- d)Both a & c
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Dynamic programming approach is used to solve-
- a)Dijkstra Algorithm
- b)Kruskal's Algorithm
- c)Prim's Algorithm
- d)None of these
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Binary search worst time complexity is-
- a)O (n)
- b)O (log n)
- c)O (1)
- d)O (n²)
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Which is the fastest memory?
- a)RAM
- b)Secondary memory
- c)DRAM
- d)Cache (correct answer)
Answer and explanation
Correct answer: (d) Cache
Cache memory is a small, very fast SRAM memory placed between the CPU and main memory to hold recently and frequently used instructions and data. Typical access times show the gap:
- L1 cache ≈ 1 ns
- DRAM main memory ≈ 50–100 ns, so cache is roughly 50–100 times faster
- Disk (SSD/HDD): millions of clock cycles
Why the other options are wrong
- (a) RAM: main memory is built from DRAM and is many times slower than cache; that is the very reason cache exists.
- (b) Secondary memory: hard disks and SSDs are the slowest level of the hierarchy.
- (c) DRAM: this is the technology main memory (RAM) uses, so it has the same speed as (a), slower than cache.
Tip: Speed order: registers > cache (SRAM) > main memory (DRAM) > SSD > HDD. Faster is smaller and costlier per byte.
Which is not Application software?
- a)Adobe Illustrator
- b)MS Office
- c)Red Hat Linux
- d)Open Office
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When we browse the internet, the browser stores some data in the computer. We are talking about-
- a)Session
- b)File
- c)Memory
- d)Cookie
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The microprocessor was first used in which generation of computers?
- a)Second generation
- b)Third generation
- c)Fourth generation
- d)Fifth generation
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In a client-server system, what does the client program do?
- a)Share data with other computers
- b)Serve information to other computers
- c)Control other connected computers
- d)Ask for information
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Question text is from the public recruitment exam; answers and explanations are written by ARBS Academy. All past papers · Government IT officer posts guide