Purpose of the study: The present study diagnoses the vocabulary knowledge employed by ESL learners’ through memory strategies. Schmiit’s (1990) Taxonomy of Vocabulary Learning Strategies (VLS) questionnaire was adopted and administered to 93 ESL learners. In order to get authenticities about the ESL learners’ memory strategies with vocabulary learning, semi-structured interviews were also conducted with 30 participants who completed the questionnaire. The result exposed the subsequent array of memory strategies used by ESL learners from the most frequent to the least frequent strategies, particularly findings revealed that ‘Use new word in sentences’, ‘Study word with a pictorial representation of its Meaning’, ‘Connect word to a personal experience’ are most popular whereas ‘Use scales for gradable adjectives’, ‘Relating word to unrelated items (Peg method)’ were least used memory strategies. Methodology: Schmitt’s Vocabulary Learning Strategies Questionnaire (VLSQ) (1997) was favored to diagnose the vocabulary knowledge through memory strategies of 93 ESL learners. Initially the responses were collected through Google Forms. Additionally, 30 ESL learners were randomly selected for interviews in accordance to reassure participants’ comprehension of the subject matters. Main Findings: The study finds effective result among 93 ESL learners in acquiring vocabulary knowledge while using memory strategies with the assistance of technological modalities. It also listed the most frequent and least frequent use of memory strategies in Schmitt’s Vocabulary Learning Strategies Questionnaire (VLSQ) (1997). Applications of this study: The present study is conducted in English Language Laboratory, where ESL learners’ can be benefitted and the learners can use these memory strategies while learning a new vocabulary when encountering a word. Novelty/Originality of this study: The existing technological modalities will assist the learners to correlate more effectively. Subject and language experts in the field can design the instructional materials and tools to assist ESL learners to improve vocabulary knowledge through memory strategies.