# GATE CSE 2011

 Question 1
In a compiler, keywords of a language are recognized during
 A parsing of the program B the code generation C the lexical analysis of the program D dataflow analysis
Compiler Design   Lexical Analysis
Question 1 Explanation:
 Question 2
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT
 A block entire HTTP traffic during 9:00PM and 5:00AM B block all ICMP traffic C stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address D block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM
Computer Network   Transport Layer Protocol
Question 2 Explanation:

 Question 3
If two fair coins are flipped and at least one of the outcomes is known to be a head, what is the probability that both outcomes are heads?
 A $1/3$ B $1/4$ C $1/2$ D $2/3$
Discrete Mathematics   Probability Theory
Question 3 Explanation:
 Question 4
Consider different activities related to email.

m1: Send an email from a mail client to a mail server
m3: Checking email in a web browser

Which is the application level protocol used in each activity?
 A m1:HTTP m2:SMTP m3:POP B m1:SMTP m2:FTP m3:HTTP C m1: SMTP m2: POP m3: HTTP D m1: POP m2: SMTP m3:IMAP
Computer Network   Application Layer Protocols
Question 4 Explanation:
 Question 5
A company needs to develop a strategy for software product development for which it has a choice of two programming languages L1 and L2. The number of lines of code (LOC) developed using L2 is estimated to be twice the LOC developed with L1. the product will have to be maintained for five years. Various parameters for the company are given in the table below.
Total cost of the project includes cost of development and maintenance. What is the LOC for L1 for which the cost of the project using L1 is equal to the cost of the project using L2?
 A 4000 B 5000 C 4333 D 4667
Software Engg
Question 5 Explanation:

There are 5 questions to complete.