Q281. What is the hexadecimal digit A in decimal?
- 11
- 9
- 12
- 10
Show answer and explanation
Correct answer: D. 10
A = 10.
Computer Science MCQs with Answers
Computer knowledge is tested in jobs ranging from clerical posts to IT positions. Practice MCQs on computer fundamentals, hardware, software, MS Office, networking, internet, databases and programming concepts, and see your score as soon as you finish.
Q282. In Excel, what is the cell reference of the first cell?
- A1
- 1A
- A0
- B1
Show answer and explanation
Correct answer: A. A1
The first cell is column A, row 1.
Q283. Which symbol is used in every email address?
- #
- &
- $
- @
Show answer and explanation
Correct answer: D. @
The @ separates user and domain.
Q284. Which SQL function counts rows?
- COUNT()
- TOTAL()
- SUM()
- NUMBER()
Show answer and explanation
Correct answer: A. COUNT()
COUNT returns the number of rows.
Q285. Who developed C++?
- Dennis Ritchie
- James Gosling
- Guido van Rossum
- Bjarne Stroustrup
Show answer and explanation
Correct answer: D. Bjarne Stroustrup
Stroustrup created C++.
Computer Science MCQs by exam
- IT Jobs Computer Science MCQs
- Clerical & Administrative Computer Science MCQs
- NTS / PTS Computer Science MCQs
- Banking Jobs Computer Science MCQs
Other subjects
- Current Affairs MCQs
- English MCQs
- General Knowledge MCQs
- Islamiat MCQs
- Mathematics MCQs
- Pakistan Affairs MCQs
- Urdu MCQs
Looking for a job? Apply while you prepare: browse the latest government and private jobs on PK JOBs Hub.