Blog Archives
1 2 3

10 Encryption and Decryption interview Q&As

Q1. What do you understand by the terms encryption and decryption? A1. Encryption is the process of converting clear data (e.g. database password, credit card number, etc) to incomprehensible cyberyext like “š£”Œz_fÓe©ˆ»[” by applying mathematical transformations. These transformations are known as encryption algorithms and require an encryption key. … Read...



12 Kerberos interview Q&As

Q1. What is kerberos? A1. Kerberos is a network authentication protocol designed to provide strong authentication for client/server applications by means of secret-key cryptography. Kerberos ensures the highest level of security to network resources. Q2. What are the 3 key components of Kerberos? … Read more ›...



15 Security key area interview Q&A for Java developers

Q1. Can you provide a high level overview of the “access control security” in a recent application you had worked? A1. As shown below, SiteMinder is configured to intercept the calls to authenticate the user. Once the user is authenticated, a HTTP header “SM_USER” is added with the authenticated user...



6 Authentication Protocols Interview Q&As – LDAP, Kerberos, OAuth2 & SAML

Q1. Why are there so many security terminologies & standards compared to tradional security systems? A1. In traditional authentication (i.e. identify yourself) / authorisation (i.e. do you have access to a specific resource?), each application had its own separate database to store authentication credentials like user names, … Read more...



6 LDAP Interview Q&As

Q1. What is an LDAP server? And what is it used for in an enterprise environment? A1. LDAP stands for Lightweight Directory Access Protocol. This is an extensible open network protocol standard that provides access to distributed directory services. … Read more ›...



AWS Web Application Security Q&As

Below questions are based on the above diagram, and extends AWS Q&As on VPC, Subnets, Availability Zones, VPN, Route tables, NACLs & Security Groups & 15+ AWS Services overview interview Q&As. Q1. What is the purpose WAF in AWS? … Read more ›...



Debugging java.security.cert.CertificateException: Certificates do not conform to algorithm constraints

Why? You may have a certificate with SHA1RSA key size less than 1024 bits or you have a certificate in your chain that uses MD2RSA.

Explanation? MD2 was widely recognized as insecure and thus disabled in Java in version JDK 7 onwards.

Read more ›



1 2 3

Java Interview FAQs

800+ Java Interview Q&As

Top