GATE CS 2018 - Compiler Design Quiz- 1 (Lexical Analysis)

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Question 1

Match the following according to input (from the left column) to the complier phase (in the right column) that processes it.

• AP-(ii), Q-(iii), R-(iv), S-(i)
• BP-(ii), Q-(i), R-(iii), S-(iv)
• CP-(iii), Q-(iv), R-(i), S-(ii)
• DP-(i), Q-(iv), R-(ii), S-(iii)

Question 2

Which of the following is not done by lexical analyzer.

• AIdentify lexemes.
• BIdentify syntax error.
• CStripping comments and blank space.
• DCo-relating error messages generated by the compiler with source program.

Question 3

Consider the following program
1: main()
2: { int x=10;
3: if(x<20;
4: else
5: y=20;
6: }
When lexical analyser scanning the above program, find the line number where the l lexical error can be produced?

• A3
• B5
• Cboth a and b
• Dno lexical error

Question 4

Which of the following is not a functionality of C compiler?

• AIdentifying tokens
• BIdentifying syntax errors
• CLinking
• DNone of these

Question 5

Dynamic linking can cause security concerns because

• ASecurity is dynamic
• BThe path for searching dynamic libraries is not known till runtime
• CLinking is insecure
• DCryptographic procedures are not available for dynamic linking

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