FCFS in os

Most stable measure of central tendency

• Mean

• Median

• Mode

• Range

To open a file c:\scores.txt for reading, we use

• infile = open(“c:\scores.txt”, “r”)

• infile = open(“c:\\scores.txt”, “r”)

• infile = open(file = “c:\scores.txt”, “r”)

• infile = open(file = “c:\\scores.txt”, “r”)

Real time systems need to __________ the interrupt latency.

• Maximize

• ZERO

• Minimize

Which of the following statements are true?

• · Shortest remaining time first scheduling may cause starvation

• · Preemptive scheduling may cause starvation

• · Round robin is better than FCFS in terms of response time

• ALL

The sections cut by a plane on a right circular cone are called as ______

• Parabolic sections

• Conic sections

• Elliptical sections

• Hyperbolic sections

The picture shows a type of user interface as a function of operating system

• Command line
• Graphical user interface

The character Dot (that is, ‘.’) in the default mode, matches any character other than _____________

• caret

• ampersand

• percentage symbol

• newline

The function of re.search is:

• Matches a pattern at the start of the string

• Matches a pattern at the end of the string

• Matches a pattern from any part of a string

• Such a function does not exist

If missing its deadline may cause catastrophic consequences on the environment under control is a _________________ type of real time system

• HARD

• SOFT

• FIRM

The output of the two codes shown below is the same. State whether true or false.

p = re.compile('hello')

r = p.match('hello everyone')

print(r.group(0))

r = re.match('hello', 'hello everyone')

print(r.group(0))

• True

• False

• May be

• Can't say