Conga Programmer's Challenge 2019

Languages

100

In Ruby, what is the output of the following expressions:

a, b, c, d = 1, 2, 3, 4

=> [1, 2, 3, 4]

a, b = c

=> ???

A) [1, 3]

B) [3]

C) [1, 2, 3]

D) 3

D) 3

200

In Python, which of these is expressions evaluates to True

A) a, b = 1000, 1000

    a is b

B) () is ()

C) {} is {}

D) [] is []

B) () is ()

300

In Java, what interface do you implement to close your streams

A) Disposable

B) Closeable

C) AutoCloseable

D) AutoDisposable

C) AutoCloseable

400

In JavaScript what does [] + [] evaluate to?

A) []

B) 0

C) undefined

D) ''

D) ''

500

In JavaScript what does {} + [] evaluate to?

A) TypeError

B) 0

C) [ {} ]

D) ''

B) 0

Cerealize

100

Trix | Cheerios

A) Corn Flakes

B) Froot Loops

C) Frosted Flakes

D) Frosted Cheerios

B) Froot Loops

200

Froot Loops & Banana Frosted Flakes

A) Cheerios

B) Trix

C) Froot Loops

D) Banana Frosted Flakes

B) Trix

300

Frosted Flakes ^ Frosted Cheerios

A) Froot Loops

B) Banana Frosted Flakes

C) Cheerios

D) Corn Flakes

C) Cheerios

400

(~Corn Flakes) << 2

A) Frosted Flakes

B) Trix

C) Frosted Cheerios

D) Cheerios

A) Frosted Flakes

500

(~Frosted Flakes >> Cheerios) | Trix

A) Banana Frosted Flakes

B) Frosted Cheerios

C) Froot Loops

D) Corn Flakes

C) Froot Loops

Drop the lg

100

Finding an element in a sorted array

A) O(n)

B) O(n^2)

C) O(n lg n)

D) O(lg n)

D) O(lg n)

200

Quick sort:

A) O(n)

B) O(n lg n)

C) O(n^2)

D) O(1)

C) O(n^2)

300

Merge sort

A) O(n)

B) O(n lg n)

C) O(n^2)

D) O(2^n)

B) O(n lg n)

400

Depth-first search

A) O(V + E)

B) O(V * E)

C) O(lgV + E)

B) O(V * lgE)

A) O(V + E)

500

Median of unsorted array

A) O(n^2)

B) O(n)

C) O(n log n)

D) O(n ^3)

B) O(n)

Does not compute

100

Is the following JavaScript valid?

a = 1

b = 2

a --> b

A) Yes

B) No

A) Yes

200

Is the following Python valid?

a = True

b = True

if a = b:

  ...

A) Yes

B) No

B) No

300

Which of the following JVM options is NOT real:

A) -XX:-AllowUserSignalHandlers

B) -XX:ScavengeBeforeFullGC

C) -XX:UseOldGC

D) -XX:UseParallelOldGC

C) -XX:UseOldGC

400

Does the following C++ code compile?

#include <string>

void f() {

  std::string(foo);

}

A) Yes

B) No

A) Yes

500

What does the following C# code print?

public class Foo

{

  public static int x = 10;

}

public class Bar : Foo

{

  new public static int x = 20;

  static void Main()

  {

    Console.WriteLine(x);

  }

}

A) Compile error

B) 10

C) 20

D) 0

C) 20

Apex Legends

100

Which one of these is not a real Salesforce Object?

A) Contact

B) Product

C) Product2

D) Contract

B) Product

200

How do you mark a function to run asynchronously in Apex?

A) @async

B) @later

C) @future

D) @notYet

C) @future

300

How do you make your function be capable of contacting a 3rd party URL

A) @future(callout=true)

B) @future(external=true)

C) @future(outside=true)

D) @future(internal=false)

A) @future(callout=true)

400

Which trigger precedence is correct?

A) after triggers, escalation rules, entitlement rules

B) validation, duplication rules, before triggers 

C) commit, escalation rules, entitlement rules

D) after triggers, workflow rules, duplicates

A) after triggers, escalation rules, entitlement rules

500

What indexed field is guaranteed for every object?

A) LastModifiedDate

B) SystemModStamp

C) LastModified

D) SystemModTimestamp

B) SystemModStamp